Preheat oven to 350℉ (180℃)
Spray a 10" x 10" pan with nonstick baking spray. Place strips of parchment paper in bottom of pan so the parchment extends over the four pan sides. (note: a 9" x 13" pan may also be used)
In a medium bowl, whisk together flour, ginger, cinnamon, baking soda and salt. Set aside for later.
2 Cups All Purpose Flour, 1 Tablespoon Ground Ginger, 1 teaspoon Cinnamon, 2 teaspoons Baking Soda, ½ teaspoon Salt
Using a stand mixer with the paddle attachment, begin mixing butter and granulated sugar until light and fluffy (2 - 4 minutes on medium speed). Scrape the bowl as needed. Note: a hand mixer may also be used.
¾ Cup Unsalted Butter, 1 Cup Granulated Sugar
Add egg and molasses to the mixing bowl. Mix on medium speed until incorporated. Scrape the bowl as needed.
¼ Cup Molasses, 1 Large Egg
Add the flour mixture and mix on low speed until combined.
Pour the dough into the bottom of the prepared pan. Using your hands, lightly press the dough down so it evenly covers the bottom of the pan.
Bake for 15 minutes. Note: crust will be partially baked - it will finish baking after the Pumpkin Cheesecake topping is added to the pan.
Let crust cool before starting the pumpkin cheesecake topping.